Water-cooled furnace-door frame.



L. L. KNOX. WATER COOLED FURNACE DOOR FRAME APPLlCATlON. FILED DEC 1, 1915.

Patented Jilly 18, 1916.

UNITED STATES PATENT oFEreE.

LUTHER L. KNOX, or AvALoN, PENNSYLVANIA, ASSIGNOR TO KNOX PRESSED a; WELDED STEEL COMPANY, or PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

w-A'rEn-cooLEn FURNACE-DOOR FRAME.

Specif cation of Letters Patent.

Patented July 18, 1910.

Application filed December 1, 1915. Serial No. 64,453.-

To all whom it may concern:

Be it known that I, Lirrnrn L. KNOX, a citizen of the United States,'residing at Ava- -lon, Allegheny county, Pennsylvania, have invented a new and useful Water-Cooled Furnace-Door Frame, of which" the following 18 a full, clear, and exact descr ption,

reference being had to the accompanying drawings, forming part of this specification,

in which Figure 1 is a front elevation, partly in section, of a door frame embodying my invention, and Figs. 2 and 3 are sections taken, respectively, on the lines Il-.II and III III of Fig. 1.

My invention has relationto water cooled door frame structures, and moreparticularly to hollow structures formed from sheet metal. 4

One object of my invention isto provide a structureof this general character made from'sheet metal plate members united at their meetingportions by means of welded joints, and which joints are located so as to -be at a distance from the door opening through the structure.

A further ob]ect of my invention is to provide a"structure of this character in which the door opening is free from sharp corners. Such corners are objectionable in these structures, since, owing to the expansion and contraction strains, they are usually the portions of. the structure which give way soonest in use.

A still further object of my invention is to provide a structure f this kind which i .can be readily manufacturedat airelatively low c st, and which will be sti-ong and durable in service.

Referring to the accompanying drawings,

in which '1 have illustrated. the preferred embodiment of my lll\'(.lltl(lll,d,l\(2 door structure is formed from an outer plate member 2 :iiid an inner plate member 3. The outer plate member Jhasits upper edge portion bcnt inwardly to form the top wall 4. of the structure, the free edge of this flange being welded at 5 to the inner surface-of the inner plate member 3, the latter being preferably extended upwardly beyond the welding point 5, as indicated, to form a securing flange (2. The plate member 2 is cut away to form thedom: opening? therethrough,this opfifffg having the rounded corner portions 8. The lateral edge portions of the member 2 are shaped to form the ofisets 9 which act angles to form the wall'12 of: the opening;

and the edges are then 'fiirther reversely bent as shown at 13, the free edges of these bent portions being welded at let to the free edges of the plate member .2 around said opening. It willlbe seengtherrifore, that in forming the structarggthe opening cut in the plate member 2 isiilargerthan the fin ished opening, while thatfcut in the member 3 is considerabl smaller than thefinished openin In this -manner the \vcldat l t-is brought to th outer face of the'structure and at a, point removedfrom the opening,

where it is not only proteeted-irom the action of themost intense heat, but is also at a point where it will not be injured by contact with anything introduced through the door opening, such as a charging box or ram. The flanges 12. of the'member 3 can be shaped to conform to the rounded corners of the opening without any cutting or welding,thus making this wallcontinuou's around the entire perimeter of. theopening. At

the bottom of the structure the narrow eon a necting portion. 15 of the platemember 2 is welded at one edge to the flange 13 of the plate member l, and at-its other edge 15 welded at 16 to the free'edge'of .th'eb ttkml.

founing flange 17. of the plate member lfi.

My invention providesa hollow sheet so I metal door-structure omposed of two plate members which can be readily cut, dieshaped and welded. Thelocation of the weld at points removed from the door opening, and also from the inner surface of the structure greatly increases its durability.

18 designatesan inlet pipe for the cooling fluid, this pipe bcing shown as extending downwardly f hin one side ofthe structu re to a pointfnearthe bottom thereof.

19 designates-the eutlet'ior the heated fluid at the opraeite r pper corner of the 'around said opening,

vmembers, each of said members ha ing door opening formed therein,'the metal surrounding "the door opening in one of the members being bent at substantially right angles to form the vrall of the door Opening and its freeedge portion again bent in a direction away from said opening-and substantially parallel to the plane of the door, and welded to the edge of the other plate around said,opening, substantially as described.

2. A hollow sheetinetaldoor frame structure composed of inner and outer plate memhers, each of said members having a door opening formed therein, the metal surroundingthe doo: openin 'i in one of the members bein bent, at substantially right angles 'to formtil'ie all of the door opening and its free edge portion again bent in a; direction away from-salclopenmg and substantially parallel to (the plane of the door,

and welded to-the edge of the other plate the wall fohnmg flanged sa d opening being continuous and rounded at the cprners of the opening, substantially as despribed.

A hollow sheet metal door frame structurecomprising; inner and outer plates of sheet metal, thei outer plate having a portion thereof cutflaway to form a door opening therethrough, and the inner plate also having a cut away portion, \vith the metal adjacent to said portion bent outwardly at substantially right angles to form the wall I of said opening, and then again bent to meet described; 5

' the edge of the cutnway portion of the other it is velded, substantially as sheet to which 4, A hollow sheet'metal door frame struc ture comprising inner and outer plates of sheet metal, the outer plate having 11 portion thereof c it away to form :rdoor opening therethrongh, and the inner plate also more? having it out aivay portion, with the metal adjacent to snid portion bent outwardly at substantially right angles to form the wall of said opening, and then again bent to most the edge of the cut away-portion of the other sheet to which it is welded, the flange forming wall of the inner sheet being continuous and rounded at the corners, substantially as described.

i hollow sheet metal door frame struclure comprising inner and outer plates of sheet metal, the outer plate having a portion thereof cut away to form' a'door opening therethrough, and the inner plate also having afcut away portion, with the metal adjacent to said portion bent outwardly at substantially right angles to form thewall of said opening, and then again bent to'meet the edge of the cut away portion of the other sheet to which it is welded, and the struc-' ture having :2. Continuous water circulating space entirely around said opening, subslantinlly as described.

6. A hollow sheetmetal door frame structure having a door opening therethrough and a bottom portion below ,said opening, said bottom portion having its.- bottom ivall formed byan outwardly turned flange of the inner plate member of the structure and having its top wall, 'whiclnalso forms the bottom Wall of said openingfiforme'd by .another outwardly turned {flange portion of said inner plate member, substantially as -desc'ribed,

7. A hollow sheet-metal "cloor-frame'str'uctore composed of inner and .outer plate inernl'mrs, each of said -n'ien'ibers having a door' opening-formed.therein, the metal of one of said sheets lwirigflzinged' to form the wall of the door openin", and its free edge portion being bentin a direction away'from said opening and welded to-theother plate,

substantially as described. v g V A hollow sheet-metaldoor-vframe structure composed of inner and outer plate members, each ofsaid members having a door opening formed therein, the metal of one of. said sheets being flanged to form the Wall of the door opening, and itsfree edge portion being bent in u direction away from said opening and welded to the other plate, said opening having rounded corner. sportions, substantially as described.

In testimony whereof, I-hzn'e hereunto set I my hand.

LUTHER n KNOX. Vii nesses:

W. C. Lrox, H. M. Column.- 

